Battery charging circuit

Details Battery charging circuit Battery charging circuit

H - Electricity

02

J

H02J 7/12 (2006.01) H02M 3/335 (2006.01)

Patent

CA 2298428

A battery charging circuit uses a simplified design for converting AC to DC and powering a flyback transformer. The switch of the flyback transformer operates at a high frequency and the time of the transformer is controlled to achieve a high power factor. The flyback transformer is fed a rectified AC signal which has not been smoothed in the traditional manner using a bulk hold capacitor and in rush limiting resister. Any treating to smooth the charging current for the battery is carried out on the secondary side. In many cases, no smoothing of the charging current is necessary. The time on of the switch is changed if necessary, slowly, relative to the pulsating input signals powering the primary winding. With a fixed T on, or slowly varying T on, dramatic fluctuations in the charging current are avoided.

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